US2760879A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reconstituted mica sheet
Assignee: Farnam Manuf Co Inc
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Filing: 1953-03-30
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Granted: 1956-08-28
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Expires: 1973-03-30
Abstract
No abstract record available.
Inventors
- 👤 Jr William T Mcdaniel
- 👤 Philip N Sales
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:09
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/34; H; H01; H01B; H01B3/00; H01B3/02; H01B3/04
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
31 words
AN IMPROVED ELECTRIC AND HEAT INSULATING ARTICLE CONSISTING ESSENTAILLY OF 50-95% FINELY DIVIDED, DELAMINATED MICA AND 5-50% OF A BONDING AGENT OF A WATER-SOLUBLE ALUMINUM PHOSPHATE RANGING FROM MONO-TO DI-ALUMINUM PHOSPHATE.
Claim 2
Dependent Claim
31 words
AN IMPROVED ELECTRIC AND HEAT INSULATING ARTICLE CONSISTING ESSENTAILLY OF 50-95% FINELY DIVIDED, DELAMINATED MICA AND 5-50% OF A BONDING AGENT OF A WATER-SOLUBLE ALUMINUM PHOSPHATE RANGING FROM MONO-TO DI-ALUMINUM PHOSPHATE.
Claim 3
Dependent Claim
86 words
A PROCESS FOR PRODUCING MICA PRODUCTS HAVING IMPROVED STRENGTH AND ELECTRICAL PROPERTIES WHICH COMPRISES PRELIMINARILY HEATING MICA FLAKES, THEREAFTER GRINDING THHE SAME INTO FINELY DIVIDED, THOROUGHLY DELAMINATED MICA PARTICLES, MIXING THE GROUND MICA WITH A WATER SOLUTION OF 5-50% ALUMINUM PHOSPHATE RANGING MONO- TO DI-ALUMINUM PHOSPHATE TO FORM A SLURRY, EXTRACTING EXCESS LIQUID FROM THE SLURRY TO FORM A SHEET THEREFROM, PARTIALLY DEHYDRATING THE SHEET, FORMING THE PARTIALLY DEHYDRATED SHEET INTO THE DESIRED SHAPE AND SUBJECTING THE SHAPED PRODUCT TO A TEMPERATURE OF AT LEAST 230*C.
Claim 4
Dependent Claim
86 words
A PROCESS FOR PRODUCING MICA PRODUCTS HAVING IMPROVED STRENGTH AND ELECTRICAL PROPERTIES WHICH COMPRISES PRELIMINARILY HEATING MICA FLAKES, THEREAFTER GRINDING THHE SAME INTO FINELY DIVIDED, THOROUGHLY DELAMINATED MICA PARTICLES, MIXING THE GROUND MICA WITH A WATER SOLUTION OF 5-50% ALUMINUM PHOSPHATE RANGING MONO- TO DI-ALUMINUM PHOSPHATE TO FORM A SLURRY, EXTRACTING EXCESS LIQUID FROM THE SLURRY TO FORM A SHEET THEREFROM, PARTIALLY DEHYDRATING THE SHEET, FORMING THE PARTIALLY DEHYDRATED SHEET INTO THE DESIRED SHAPE AND SUBJECTING THE SHAPED PRODUCT TO A TEMPERATURE OF AT LEAST 230*C.
References Cited (Backward Citations)
US1975080A
Cited
US2420475A
Cited
US2405884A
Cited
US2549880A
Cited
US2444347A
Cited
US2425152A
Cited
US2614055A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-08-28 | 1960-02-27 | 1960-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-08-28 | 1964-02-27 | 1964-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-08-28 | 1968-02-27 | 1968-08-28 | $7700.00 | Window Closed / Lapsed |